Endangered Species: Research Strategy and Long-Term Monitoring Needed for the Mojave Desert Tortoise Recovery Program

摘要

In this report, we (1) evaluate the scientific basis for the 1990 listing, the critical habitat designation, and the recovery plan recommendations for the desert tortoise; (2) assess the effectiveness of actions taken by federal agencies and others to conserve desert tortoises; (3) describe what is known about trends in tortoise populations; and (4) identify costs and benefits associated with desert tortoise recovery actions since the desert tortoise was first listed in 1980, to the extent that data were available.